Flow rate: 230 gphConnections: 3/4" ID hose fits inlet / 1/2" ID hose fits outlet20 WattsDimensions: 3.25" X 3.5" X 2User Manual (pdf file in new window)The Maxi-Jet aquarium powerhead is ideal for powering undergravel filters or creating internal water movement from its fully rotational output. The Maxi Jet incorporates a venturi aeration device to provide optimal aeration and gas exchange in the aquarium. A silencer keeps the venturi aeration device operating quietly. An adjustable air filter permits the user to fine-tune air volume and water mixing as desired.